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1. |
Solve y = 7x + 8 if the domain is {-4, -2, 0, 2}. |
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A. |
{-22, -8, 6, 20} |
B. |
{-20, -6, 8, 22} |
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C. |
{-36, -22, -8, 6} |
D. |
{-4, -2, 0, 2} |
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Hint |
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2. |
Determine the slope of the line containing the points P(-7, -8) and Q(3, 0). |
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A. |
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B. |
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C. |
-2 |
D. |
2 |
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Hint |
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3. |
Use the x-intercept and y-intercept to graph the equation . |
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A. |
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B. |
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C. |
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D. |
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Hint |
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4. |
What is the solution of the system of equations shown below? |
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A. |
(1, -2) |
B. |
(0, -3) |
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C. |
(0, 0) |
D. |
(3, 0) |
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Hint |
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5. |
Determine whether the relation {(7, 2), (-10, 3), (-5, -1), (7, 3)} is a function. Explain. |
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A. |
Yes, because every relation is a function. |
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B. |
No, because there is an element in the domain that is paired with two elements in the range. |
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C. |
Yes, because each element in the domain is paired with exactly one element in the range. |
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D. |
No, because there are two elements in the domain that are paired with the same element in the range. |
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Hint |
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6. |
Which of the following is (are) true about functions? |
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A. |
Functions are relations. |
B. |
In a function, each member of the domain is paired with one and only one member of the range. |
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C. |
Functions pass the vertical line test. |
D. |
All of these |
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Hint |
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7. |
Find four solutions for y = 3x – 1 if the x values are 0, 1, 2, 3. |
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A. |
(-1, 0), (2, 1), (5, 2), (8, 3) |
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B. |
(0, -1), (1, 2), (2, 5), (3, 8) |
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C. |
(0, 0), (1, 3), (2, 6), (3, 9) |
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D. |
(0, 1), (1, 4), (2, 7), (3, 10) |
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Hint |
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8. |
Find the x- intercept of 4x – 6y = 24. |
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A. |
4 |
B. |
-6 |
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C. |
6 |
D. |
-4 |
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Hint |
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9. |
Find the slope of the line. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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10. |
Suppose y varies directly with x and y = -10 when x = 5. Write an equation relating x and y. |
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A. |
y = -2x |
B. |
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C. |
y = 2x |
D. |
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Hint |
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11. |
The direct variation equation y = 19.99x gives the total cost y of x DVDs at a store. Find the total cost of 5 DVDs. |
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A. |
$99.80 |
B. |
$99.95 |
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C. |
$119.94 |
D. |
$94.95 |
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Hint |
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12. |
State the slope and y- intercept of the graph of  |
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A. |
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B. |
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C. |
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D. |
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Hint |
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13. |
State the y- intercept of the graph of 4x + y = -11. |
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A. |
11 |
B. |
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C. |
-11 |
D. |
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Hint |
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14. |
Write an equation in slope-intercept form of a line with slope 5 and y- intercept –7. |
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A. |
y = 5x + 7 |
B. |
x = 5y – 7 |
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C. |
x = 5y + 7 |
D. |
y = 5x – 7 |
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Hint |
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15. |
Write an equation for the line that passes through (-20, -1.5) and (8, 2). |
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A. |
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B. |
y = 8x – 14 |
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C. |
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D. |
y = -8x + 18 |
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Hint |
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16. |
Write an equation in slope-intercept form for the best-fit line of a scatter plot with points (21, 57) and (30, 12). |
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A. |
y = 5x – 48 |
B. |
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C. |
y = -5x + 162 |
D. |
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Hint |
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17. |
A best-fit line has the equation y = 1.75x + 2.25, which models the cost y of renting a taxi for x miles. Predict the cost of renting a taxi for a 12-mile ride. |
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A. |
$23.25 |
B. |
$22.65 |
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C. |
$23.85 |
D. |
$22.05 |
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Hint |
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18. |
Solve the system of equations given by y = -2x and y = x + 3. |
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A. |
(1, -2) |
B. |
(-1, 2) |
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C. |
(3, 6) |
D. |
(-3, -6) |
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Hint |
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19. |
Match the graph shown with the correct inequality. |
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A. |
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B. |
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C. |
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D. |
y < -4x – 6 |
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Hint |
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20. |
Match the graph shown with the correct inequality. |
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A. |
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B. |
y > 3x + 6 |
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C. |
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D. |
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Hint |
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